PhysioguidebydivyaA

  Bone Bone is one-third connective tissue. It is impregnated with calcium salts which constitute the remaining two- thirds part.  The inorganic Calcium salts (mainly calcium phosphate, partly calcium carbonate, and traces of other salts) make it hard and rigid.  The organic connective tissue (collagen fibers) makes it tough and resilient (flexible). 

  Systems of the body :- Respiratory system (Pulmonology)  Articular system (arthrology)  Muscular system Circulatory system (angiology)  Lymphatic system Skeletal system (osteology)  Integumentary system (dermatology)  Digestive system (gastroenterology)  Urinary system (urology)  Reproductive system (andro, gynic)  Endocrine system (endocrinology)  Special senses Nervous system ( neurology)